XML 87 R60.htm IDEA: XBRL DOCUMENT v2.4.1.9

Insurance (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Insurance [Line Items]
Insurance reserves - current portion	$ 495.1us-gaap_OtherLiabilitiesCurrent	$ 429.7us-gaap_OtherLiabilitiesCurrent
Insurance reserves - long-term portion	204.3us-gaap_OtherLiabilitiesNoncurrent	174.3us-gaap_OtherLiabilitiesNoncurrent
Insurance reserves [Member]
Insurance [Line Items]
Insurance reserves - current portion	24.9us-gaap_OtherLiabilitiesCurrent / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember	24.1us-gaap_OtherLiabilitiesCurrent / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember
Insurance reserves - long-term portion	46.5us-gaap_OtherLiabilitiesNoncurrent / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember	42.2us-gaap_OtherLiabilitiesNoncurrent / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember
Total insurance reserves	$ 71.4us-gaap_OtherLiabilities / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember	$ 66.3us-gaap_OtherLiabilities / us-gaap_BalanceSheetLocationAxis = an_ReservesForInsuranceCostsMember

X

- Details

Name:	an_InsuranceLineItemsLineItems
Namespace Prefix:	an_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Article 9



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_OtherLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6904-107765

+ Details

Name:	us-gaap_OtherLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 24

-Article 5

+ Details

Name:	us-gaap_OtherLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=an_ReservesForInsuranceCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: